Stage partially collapses in Miami leaving 4 injured, 1 critical

(CNN) -- A stage partially collapsed Thursday night in Miami, Florida, injuring four people -- one of them critically -- said an official with the city's fire department.

The incident occurred around 7:48 p.m. and one day before the start of the Ultra Music Festival, which is scheduled to run from Friday night through Sunday.

Emergency responders were still at the scene around 9:30 p.m., though it was not believed that anyone was still trapped in any debris, the fire department official said.